:root{--bg:#f7f8fa;--fg:#14171f;--card:#fff;--line:#d9dde5;--accent:#2457d6}
@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--fg:#eef1f6;--card:#181c25;--line:#2b3140;--accent:#7aa2ff}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;min-height:100dvh;display:grid;place-items:center;padding:24px 16px;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{width:100%;max-width:420px;text-align:center}
h1{font-size:1.6rem;margin:0 0 4px}
p{margin:0 0 24px;opacity:.75}
a.l{display:block;margin:10px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--fg);text-decoration:none;font-weight:600}
a.l:hover,a.l:focus-visible{border-color:var(--accent);outline:none}
a.l small{display:block;font-weight:400;opacity:.7}